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G. HAYES;

PHOTOGRAPHIG SKYLIGHT.

No. 252,375. Patented Jan. 17,1882.

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"GEORGE HAYES OF NEW YORK, N.

PHOTO-GRAPHIC SKYLIGHT.

SPECIFICATION forming part of Letters Patent No. 252,375, dated January17,1882.

a Application filed April it, 1881. (Nomodelj To an whom it may concern:

Be it known that I, GEORGE HAYES, of the city, county, and State of NewYork, have invented a new and useful Improvement in PhotographicSkylights; of which the following is bination of straight and curvedsurfaces of glass plates supported bywertical, curved, anddiagonally-arranged continuous bars running .in straight and curved linein conformity with the diagonal slope, curve, and vertical positionrequired for the glass plates, and the object sought being, first, theobtaining ,of a full,

- free,-and extreme quantity of daylight without glass, and d thesloping glass.

shadow or distorted rays, and, second, to obtain the daylight at such anangleas may be desirable, according to the subject in hand, and from adirection heretofore considered unattainable.

1n the drawings accompanying, Figure 1 is a perspective "iew, showingthe interior of a photographic operating-room, and in which isrepresented my improved skylight. Fig. 2 is a ver! ical transversesection of the same through the skylight direct.

a represents the bars which support the glass, and of which there willbe asmany as necessary, according to the size of the skylight. a

b represents the vertical glass, 0 the curved 6 represents thebasc-frameof the skylight, andf the ridge, apex, or highest pointthereof. It has been h'eretoi'tre customary to have a transom at thepoint ofjunctiou of the vertical or wall light with the sloping(diagonal) or roof light, which were thereby entirely separated.

in fact, they were two distinctlights, and where the transom was nolight could be obtained; besides, it threw a dark shadow injurious tothe proper effect. I have combined the walllight with the sloping orroof light by means of curved plates ofglass, in lieu of the heretoforeconsidered necessary transom, and make my skylight'continuous from baseof wall or vertical light to the apex or ridge of the sloping or rooflight, both as regards glass and the bars supporting the same. Lightentering at an angle, say, of about forty-five degrees is often foundvery desirable in the operation of photography, and heretofore thiscould not be readily obtained owing to the breadth of the transom; butowing to there being no transom in my light, in the place of which Ihave substituted the curved glass, it will be readily seen that there isno obstruction to light entering at that angle.

Shades may be rolled down readily from the top of my light, and othersrolled upward (or drawn upward) from the bottom or base, so as to shutoff entirely all light entering except at that particular angle(forty-fivedegrees) or at.

any other angle desired to meet the desired purpose. In fact, in placeof a dark obstructive transom, I usewhat might be termed, perhaps, aglassor ttanslucenttra1isom. I make in one the light roof or slopinglight and wall or vertical light, and in addition thereto a curved ortransom light, all operating together; and when desired either may beshut off or dispensed with, thereby enabling theoperator to getrays oflight from any angle which he may find most suitable-a facility neverbefore considered practicable.

What I claim asmy invention, and desire to secure by LettersPatentot'the United States, is-

A photographic skylight consisting of walllight with plane-surfaceglass, roof-light, also with plane-surface glass, and an gle'light ofcurved or bent glass, all sustained by lengthwise bars or rafters, andcombined so as to constitute a continuous glass surface, without transomor cross-bar, from base of wall-light to highest point or apex ofroof-light, substan-

